/*
 *  Copyright 2004 Blandware (http://www.blandware.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.blandware.atleap.webapp.action.core.user;

import com.blandware.atleap.common.Constants;
import com.blandware.atleap.service.core.UserManager;
import com.blandware.atleap.service.exception.BeanNotFoundException;
import com.blandware.atleap.webapp.action.core.BaseAction;
import com.blandware.atleap.webapp.form.core.UserForm;
import org.apache.commons.validator.GenericValidator;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * <p>Deletes user
 * </p>
 * <p><a href="DeleteUserAction.java.html"><i>View Source</i></a></p>
 * <p/>
 *
 * @author Sergey Zubtsovskiy <a href="mailto:sergey.zubtsovskiy@blandware.com">&lt;sergey.zubtsovskiy@blandware.com&gt;</a>
 * @version $Revision: 1.21 $ $Date: 2008/04/29 17:51:49 $
 * @struts.action path="/core/user/delete"
 * name="userForm"
 * scope="request"
 * validate="false"
 * roles="core-user-delete"
 * @struts.action-forward name="listUsers"
 * path="/core/user/list.do"
 * redirect="true"
 * @struts.action-forward name="unsatisfiable"
 * path="/core/user/list.do"
 */
public final class DeleteUserAction extends BaseAction {
    /**
     * @param mapping  The ActionMapping used to select this instance
     * @param form     The optional ActionForm bean for this request (if any)
     * @param request  The HTTP request we are proceeding
     * @param response The HTTP response we are creating
     * @return an ActionForward instance describing where and how
     *         control should be forwarded, or null if response
     *         has already been completed
     */
    public ActionForward execute(ActionMapping mapping, ActionForm form,
                                 HttpServletRequest request, HttpServletResponse response) throws Exception {

        UserForm userForm = (UserForm) form;
        String userName = userForm.getName();
        if (GenericValidator.isBlankOrNull(userName)) {
            if (log.isWarnEnabled()) {
                log.warn("Missing user name. Returning to list...");
            }
            return mapping.findForward("listUsers");
        }

        if (userName.equals(request.getRemoteUser())) {
            // currently logged in user cannot be deleted
            saveToken(request);
            ActionMessages errors = new ActionMessages();
            errors.add("loggedUserCannotDelete", new ActionMessage("core.user.form.loggedUser.cannotDelete"));
            saveErrors(request, errors);
            return mapping.findForward("listUsers");
        }

        UserManager userManager = (UserManager) getBean(Constants.USER_MANAGER_BEAN);
        try {
            userManager.deleteUser(userName);
        } catch (BeanNotFoundException e) {
            // user not found. it might be deleted by someone else
            ActionMessages errors = new ActionMessages();
            errors.add("userNotFound", new ActionMessage("core.user.errors.notFound"));
            saveErrors(request, errors);
            return mapping.findForward("listUsers");
        }
        return mapping.findForward("listUsers");
    }

}